<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <h1>html调试</h1>
    <button>修改标题颜色</button>

    <script>
        document.querySelector('button').onclick = () => {
            console.log('in btn click')
            document.querySelector('h1').style.color = '#ff0000'
        }
    </script>

    <script src="https://unpkg.com/vconsole@latest/dist/vconsole.min.js"></script>
    <script>
        // VConsole 默认会挂载到 `window.VConsole` 上
        var vConsole = new window.VConsole();
    </script>
</body>
</html>